In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Quality Control of 6-Methylpyridazin-3(2H)-one, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 13327-27-0, name is 6-Methylpyridazin-3(2H)-one. In an article，Which mentioned a new discovery about 13327-27-0
An efficient copper-catalyzed N-arylation of pyridazinones with a structurally well-defined copper complex
N-Arylation of pridazinone derivatives 1 with an aryl or heteroaryl bromide or iodide 2 has been achieved in 70-94% isolated yield using catalytic amounts of the stable and structurally well defined copper catalyst 4b under standard Ullmann-Goldberg reaction conditions. The structure of copper catalyst 4b was characterized by ESI-MS, DSC and the single crystal X-ray.
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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N324 – PubChem